－For some time the discussion went with no one saying _________ word．Alice finally broke．

－_________ Silence．

A．a; the

B．the;a

C．a；不填

D．the；不填

－Did Tom go back late last night?

－No．It was just nine o'clock _________ he arrived home．

A．when

B．after

C．until

D．that

－Professor, do you have something _________ at this moment?

－No, thanks．I'll call you if there is any．

A．typing

B．typed

C．to type

D．to be typed

－Do you really mean it when you say he will _________ a good president?

－Yes, I think he has all the right qualities to be a president．

A．judge

B．suit

C．turn

D．serve

－Can I help you, Madam?

－_________．

A．Yes, you can

B．No, I don’t need anything

C．Of course, if you like

D．No, thanks．I am being served

－Will you stay for dinner?

－Sorry, I _________．My sister is coming to see me．

A．mustn’t

B．can’t

C．needed

D．shouldn’t

－Let’s try operating the machine right now．

－Wait．Better read the _________ first．

A．instructions

B．explanations

C．information

D．intrduction

－Did you hear the news this morning?

－Oh, yes, _________ was announced on the radio has caused great excitement among the students．

A．that

B．what

C．as

D．it

－How long are you staying?

－I don’t know __________．

A．That’s ok

B．Never mind

C．It depends

D．It doesn’t matter

－Would you like some more chicken?

－No thanks．I am _________ a diet and I’m trying to _________ weight．

A．on; lose

B．in; put on

C．on; have

D．in; lose